Peters



dal.) 2 Sheets-Sheet '1.

s! HUTGHINSON.

SETTING FOR HOT AIR PUB-HADES- No.-2'73.993. Patented Mar. 13,1883.

' Dye/a?) ni. Imus mbun n iw. mm o. c

(No Model.)

1 -2 Shets-Sheet 2 -13. S. HUT'C'HINSON.

, SETTING FOR HOT AIRPURNAGES, No, 273,993. Patented Mar. 13,1883.

urmns WWMD'C' UNITED. STATES.

PATENT OFFICE.

ELIAS S. HUTCHIN SON, OF WASHINGTON, DISTRICT OF COLUMBIA.

SETTING FOR HOT-AIR FURNACES SPECIFICATIQN forming part of Letters Patent No. 273,993, dated March 13, 1883.

Application filed April 17, 1882. (N0 model.)

T 0 all whom it may concern Be it known that I, ELIAS S. HU'rcHINsoN, acitizen of the United States, residing at Washington, in the District of Columbia, have invented a new and useful Improvement in Settings for Hot-Air Furnaces, of which the following is a specification.

My invention relates to brick-set hot-air furnaces; and it.cousists in combining with the customary brick walls of furnace-settings a crown or top composed of a metallic casing formed of hollow sections or boxes filled with mineral wool or other non-conducting material. t

In carrying out myinvention I buildup the side and back walls of the furnace-setting of masonry or brick-work in the usual manner,

and form the front in any of the customary modes which may be adapted for the particular furnace inuse; but insteadof the ordinary arch orcrown of masonry, formed'ofbrick or like material laid upon supporting iron girders, I employ a connected series of hollow metallic boxes or pipes firmly attached at thejoints by solder or other suitable means and filled with mineral wool, asbestus, or any suitable nonconducting material or compound possessing the necessary qualities of lightness and incombustibility.

In the accompanying drawings, Figure 1 is a perspective view of a furnace-setting illustrating my invention, with the brick-work partially broken away and the crown or.top shown partly in section. Fig. 2 is a perspective view of a connected series of hollow boxes adapted to span the space between the furnace-walls.

Fl g. 3 is a longitudinal section taken through the line 3 3 ot'Fig. 2.

A A represent the walls of the ordinary furnace-setting; B, a furnace, which may be of any of the known forms; 0, the air-chamber surrounding the furnace and inclosed by the walls A, and D D the'customary hot-air flues'.

The improved crown or top of the setting is shown at E in Fig. 1, and aportion of its component parts is illustrated in detail-in Figs.-

a structure of the proper length to extend across between the side walls, A A, of the furnace-settin g and to rest securelyon said walls. a

The boxes are filled with mineral wool or other suitable non-conducting material F, and

laid together in parallel rows E E as illustrated in Figs. 1 and.2, when they are securely soldered or cemented together at the joints e between the adjoining faces of the rows of connectedseriesofboxes. Acontinuousanddurable air-tightcrown or top is thus formed for the furnace-setting,which is entirely free from.

the liability to crack and open at the joints.

This is a serious disadvantage and difficulty with brick settings as now made, and causes much loss of heat by the leakage of hotair.

I am aware of the existence of a casing for furnaces composed of two concentric shells of sheet metal cemented together by a non-conducting cement and formed into sections which are united by lap or slipjoints. Idisclaim the construction specified, and make no broad claim to a metallicnon-conducting surface of any other construction than that hereinbefore described.

Having thus described my invention, the following is what I claim as new therein and desire to secure byLetters Patent: g

In a brick-set hot-air furnace, the crown or top E, composed .ofa' series of connected boxes filled with a non-conducting material and'laid in parallel rows having their adjoining faces secured in an air-tight manner, as and for the purpose set forth.

' ELIAS S. HUTOHINSON.

Witnesses:

OCTAVIUS KNIGHT, J. F. MANNING. 

